Development of a new model for vibration-dissociation coupling in nitrogenA new model for vibration-dissociation coupling is derived using knowledge obtained from a simulation of the vibrational relaxation of heated nitrogen by collisional processes. This bilevel model is based on the assumption that nitrogen can be represented by two molecular species. The vibrational energy relaxation is represented by a modified form of the Landau-Teller equation. The effects of the bilevel model on a typical hypervelocity flowfield computation are examined and compared to the Park TTv model. Specifically, it is found that the bilevel model exhibits a decreased dissociation rate. This is believed to be due to the inhibition of dissociation by nonequilibrium vibrational relaxation.
Document ID
19920065212
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Landrum, D. B. (NASA Ames Research Center Moffett Field, CA, United States)
Candler, Graham V. (North Carolina State University Raleigh, United States)